\begingroup
\centering
\begin{tabular}{lcc}
   \tabularnewline \midrule \midrule
   Dependent Variable: & \multicolumn{2}{c}{IM}\\
   Model:       & (1)             & (2)\\  
   \midrule
   \emph{Variables}\\
   Constant     & -0.7175$^{***}$ &   \\   
                & (0.0297)        &   \\   
   log(Pop)     & 0.0125$^{***}$  & 0.0043\\   
                & (0.0044)        & (0.0110)\\   
   \midrule
   \emph{Fixed-effects}\\
   GIS\_ID      &                 & Yes\\  
   Year         &                 & Yes\\  
   soil\_type   &                 & Yes\\  
   NUTS2        &                 & Yes\\  
   \midrule
   \emph{Fit statistics}\\
   Observations & 1,707           & 3,367\\  
   R$^2$        & 0.00463         & 0.93454\\  
   Within R$^2$ &                 & 0.00018\\  
   \midrule \midrule
   \multicolumn{3}{l}{\emph{Signif. Codes: ***: 0.01, **: 0.05, *: 0.1}}\\
\end{tabular}
\par\endgroup
